Apropos of nothing, I just utterly dismantled Namtar with a purist Goblin Assassin. Which I've done before, but was in the mood. No video. I had Binlor, JJ, and Dracul all clustered together and the Blacksmith subdungeon (and that Mas09 subdungeon, which I basically ignored until the end and just converted the item). Didn't use APHEELSIK even once, didn't even bother with Dracul, just farmed Binlor for piety and a few Stone Hearts then converted into JJ and immediately took Petition, followed a bit later by one of each boost and then Chaos Avatar during Namtar's second form. (JJ still needs some adjusting... Petition is too expensive and he's nearly unplayable if you don't have enough unexplored space / conversion piety to get it promptly.) No BLUDTOPOWA either, just alternating between PISORFs, BURNDAYRAZes, physical attacks, and level ups, and wailing away on Namtar with a fully explored map.
(For all the complaints about Namtar right now, I remember when his first form had blink and Frozen Trolls had like 75% - or was it 90% - resistances. Assassins still didn't care.

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I think I'm going to do a Tinker in Naga City next. Seems pretty doable with minimal or no scumming, using a mixed physical / Mystera strategy.